Coin wrapping apparatus

ABSTRACT

A coin wrapping apparatus wherein a predetermined number of coins of the same denomination are stacked, wrapped with a piece of paper, and the ends of the thus wrapped paper are fold crimped is further improved by providing means for driving the coin wrapping rolls to rotate, means for varying the rotational speed of the wrapping rolls, and means for selecting the rotational speed of the wrapping rolls in accordance with the kind of the coins, so that the rotational speed of the wrapping rolls is controlled to be at an optimum value.

United States Patent 1 91 Ushio Sept. 30, 1975 [54] COIN WRAPPING APPARATUS 3,775,940 12/1973 Hatanaka 53/212 1 3. 2] 17 71974 H ..53 X [75] Inventor: Masatoshi Ushio, Himeji, Japan 8 9 mmdkd Q12 [73] Assignee: Glory Kogyo Kabushiki Kaisha, Primary l-lraminer Travis S. McGehee Himeji, Japan Assistant Examiner-John Sipos Filed Jan 15 1974 Attorney, Agent, or FirmWenderoth, Lind & Ponack [21] Appl. No.: 433,492 [57] ABSTRACT A coin wrapping apparatus wherein a predetermined [30] Foreign Application Priority Data number of coins of the same denomination are Jan. 17 1973 Japan 48-8026 Stacked, Wrapped with a lhiece of P p and the ends I of the thus wrapped paper are fold crimped is further 521 US. Cl. 53/212 improved y Providing means for driving the coin 51 1m. (:1. B65B 11/04 pp rolls to rotate, means for varying the [58] Field of Search 53/210, 211; 212 one! Speed of the pp rolls, and means for lecting the rotational speed of the wrapping rolls in ac- [56] References Cited 1 cordance with the kind of the coins, so that the rota- UNITED STATES PATENTS tional speed of the wrapping rolls is controlled to be at I 1 an optimum value. 1.091853 5/l9l4 Graves 53/212 X 2,635.402 4/ I953 Jorgcnsen 53/212 4 Claims, 9 Drawing Figures U.S. Patent Sept. 30,1975 Sheet 1 of 8 3,908,338

FIG.

U.S. Patent Sept. 30,1975 Sheet 2 of8 3,908,338

U.S. Patent Sept. 30,1975 Sheet 3 of8 3,908,338

US. Patent Sept. 30,1975 Sheet4 of8 3,908,338

FIG.4

U.S. Patent Sept. 30,1975 Sheet 5 of 8 3,908,338

US. Patent Sept. 30,1975

Sheet 6 0f 8 US. Patent Sept. 30,1975 Sheet 8 of 8 3,908,338

- FIG. 9

1 corN WRAPPING APPARATUS BACKGROUND or THE INVENTIO This invention relates generally to coin wrapping machines, and more particularly to a coin wrapping apparatus included in the machine, wherein a stack of coins of the same denomination is clamped between a plurality of wrapping rolls and thereby rotated, a piece of wrapping paper then being wound around the stack of coins thus rotated, and the lateral edges of the wrapping paper projecting beyond the ends of the stack are.

fold crimped over the uppermost and lowermost coins of the stack.

Ordinarily, in the coin wrapping apparatus included in the conventional coin wrapping machines, wherein a stack of coins of the same denomination is rotated between three wrapping rolls to be wrapped by a piece of coin wrapping paper, and the lateral edges of the wrapping paper thus wound around the peripheral surface of the stack of coins are fold crimped over the upper and lower ends of the stack of coins by means of wrapper fold crimping needles or hooks, the rotational speed of the three wrapping rolls has been kept at a constant value regardlessof the diameter of the coins thus stacked. Thus, when the diameter of coins is large, the rotational speed of the stack of coins becomes low, which together with a comparatively greater length of the wrapping paper, causes a mismatching in the operation of thefold crimping needles, thus giving rise to unsatisfactory fold crimping. Furthermore, when the diameter of the coins is comparatively small, the rotational speed of the stack of coins becomes excessively high, which together with a comparatively shorter length of the wrapping paper, causes the fold crimping needles to contact the wrapping paper for an excessively long period, thus resulting in wear or weakening of the wrapping paper. In addition, a great difference is caused between the wrapping periods for the stacks of coins of different diameters.

SUMMARY OF THE INVENTION With the above noted difficulties in view, a primary object of the present invention is to provide a .coin wrapping apparatus wherein the rotational speed of the wrapping rolls is controllably variable in accordance with the diameter of the stack of coins.

Another object of the invention is to provide a coin wrapping apparatus wherein the wrapping paper is cut to a suitable length in accordance with the diameter of the stack of coins thereby to assure good wrapping and crimping of the coins.

The above objects and further features of the present invention can be achieved by an improved coin wrapping apparatus of the type wherein a stack of coins of the same denomination and of a predetermined number is rotated in contact with a plurality of wrapping rolls, and wrapped by a piece of wrapping paper wound 'therearound so that the lateral edges of the wrapping paper are fold crimped against the upperand lowermost coins, in which apparatus there is further provided the improvement comprising means for driving the wrapping rolls in rotation, means for varying the rotational speed of the wrapping rolls, and means for selecting the rotational speed of the wrapping rolls in accordance with the kind of the coins, whereby the rotational speed of the wrapping rolls is controlled in accordance with the kind of coins.

The invention will be more fully understood from the hereinlater described detailed description of the invention when read in conjunction with the accompanying drawings, wherein like parts are designated by like reference numerals and characters.

BRIEF DESCRIPTION OF THE DRAWINGS In the drawings:

FIG. 1 is a perspective view of a coin wrapping machine wherein an example of a coin wrapping apparatus according to the present invention is incorporated;

FIG. 2 is a perspective view of an important part of the coin wrapping apparatus for classifying, stacking, and wrapping coins;

FIG. 3 is an exploded perspective view showing the essential parts of the coin wrapping mechanism wherein the rotational speed of coin wrapping rolls is made variable;

FIG. 4 is a relatively enlarged plan view showing one part of the mechanism shown in FIG. 3;

FIGS. 5 and 6 are diagrams schematically showing various positions of the coin wrapping rolls relative to the stack of coins;

FIG. 7 is a diagram schematically showing the trans mission of the driving power to the coin wrapping rolls and to paper feeding rolls;

FIG. 8 is a circuit diagram showing a circuit for supplying power to a driving motor and a circuit for controlling the speed of the driving motor; and,

FIG. 9 is a perspective view of a paper cutting mechanism for operating cooperatively with the coin wrapping mechanism.

DETAILED DESCRIPTION OF THE INVENTION Referring now to FIG. 1 showing the outline of an example of a coin wrapping machine to which the invention is applied, the coin wrapping machine, generally designated by reference numeral 1, comprises essentially a coin supplying device 2, a coin stacking device 3 for stacking coins supplied from the coin supplying device 2, a wrapping device 4 for wrapping a piece of wrapping paper around the stack of a predetermined number of coins and finishing the wrapping operation, a coin stack transferring mechanism 5 for introducing each coin stack into the coin wrapping device 4, a

wrapper feeding device 6 for supplying the wrapper strip toward the coin wrapping device 4, and a control device 7 for regulating the operation of the coin wrapping device 4. I

The above-mentioned coin supplying device 2 of the machine 1 comprises a hopper 10, a revolving disc 12 which sends out, by centrifugal force, coins dropped into the hopper 10 successively toward a coin selectingand-counting passage 11, a coin conveying belt 13 for conveying the coins sent into the coin selecting-andcounting passage 1 1, a selecting device 14 for selecting coins thus conveyed and excluding coins of smaller diameters, and a coin counting mechanism in which a coin counting sprocket wheel 15 is rotated by the coins thus selected, the number of rotations of the wheel 15 is counted, and the wheel 15 is then locked for stopping a further supply of coins when the passage of a predetermined number of coins is detected.

The coin-stacking device 3 comprises a coin alignment cylinder 17 provided at the downstream side of a coin guiding tube 16 at the end of the coin selecting and-counting passage 11, a vibrating device 18 for causing vibration in the coin alignment cylinder 17 to place the coins in a stack with good alignment and a shutter mechanism 19 for opening and shutting the outlet of the alignment cylinder 17.

The coin wrapping device 4 comprises a plurality of wrapping rolls 20, 21, 22 movable toward or away from each other, and a pair of fold crimping hooks 23 and 24. A stack of predetermined number of coins is introduced into a space surrounded by the plurality of wrapping rolls, and clamped and rotated by these rolls 20, 21, and 22 so that the stack is wrapped by a piece of wrapping paper introduced thereto as described hereinafter.

The coin stack transferring mechanism is provided downwardly spaced apart from the shutter mechanism 19, and comprises a vertically movable guide tube 28 having a coin supporting portion 27, and a coin holding rod 29 passed through the guide tube 28. The portion 27 introduces each stack of coins descending thereon upon opening of the shutter mechanism 19 into the space surrounded by the wrapping rolls 20, 21, and 22,

and the coin holding rod 29 is vertically moved through the vertically movable guide tube 28 and holds the -stack of coins introduced into the space at a suitable level. The coin stack transferring mechanism 5 is shifted aside in its entirety under the coin wrapping device 4 when a stack of coins thus wrapped by a piece of wrapping paper is delivered downwardly from the coin wrapping device 4.

The wrapper feeding device 6 comprises a mechanism 30 for supporting ribbon-form wrapping paper or the like 25 in a rolled form, a feed roll mechanism 33 having a driving roll 31 and an idler pinch roll 32 for feeding the coin wrapping paper or the like 25 therebetween, and a cutting device 34 to cut the coin wrapping paper 25 to a length sufficient for wrapping each coin stack. A piece of wrapping paper 25 thus cut to appropriate length is guided between the coin stack and the wrapping rolls 20, 21, and 22 in a manner such that the wrapping paper 25 is wrapped around the coin stack.

Reference numeral 8 designates a coin receiving chute through which wrapped stacks of coins are discharged.

The coin wrapping device 4 will now be described in more detail with reference made to FIG. 3. In this drawing, for simplifying the description, holes through which corresponding shafts are fixedly mounted are indicated with hatching, and holes in which corresponding shafts are rotatably mounted are indicated without hatching. Furthermore, those schematically indicated to provide bearings are all supported by the frame of the machine.

The device 4 shown in FIG. 3 is a practical example intended to shift the coin wrapping rolls 20, 21, and 22 toward and away from the stack of coins in accordance with the diameter of the coins. A knob 35 for setting the kind (or diameter) of coins is connected to a shaft 36 directly or indirectly through a combination of a rotary switch, a motor, a cam and the like, and a gear 37 is fixedly mounted on the shaft 36. The gear 37 meshes with another gear 39 rotatably mounted on a shaft 38.

A cam 40, by which moving distances of the three wrapping rolls 20, 21, and 22 are set, is provided coaxially and in a fixed relation with the gear 39, and the configuration of the cam 40 is so shaped that eight steps are provided in the distance from the center to the periphery of the cam 40.

On the shaft 38, arms 41 and 42, and a sector gear 43 are also fixedly mounted. The arm 41 rotatably supports a shaft 44 passing approximately the middle portion thereof, and on the shaft 44, a lever 45 is rotatably supported at approximately the middle portion thereof. The lever 45 has a roll 46 at one end thereof which is urged against the periphery of the cam 40 by a spring 47.

A shaft 48 is rotated at a rate of one revolution per one cycle of the coin wrapping operation, and cams 49 and 50 are fixedly mounted on the shaft 48. As more clearly seen in FIG. 4, on one of the cams 49, there are formed a surface 51 defining the positions of the wrapping rolls 20, 21, and 22 providing a minimum distance between each other, and another surface (or a middle distance defining surface) 52 for defining the positions of the same rolls adapted to receive a coin stack, whereas on the other cam 50, a surface 53 defining a maximum distance between the same rolls is provided. The roll 54 provided at an end of the lever 45 is contacts the peripheral surfaces of the cam 49, and a roll 55 provided at the outer end of the arm 41 is so disposed that it contacts only the surface 53 of the cam 50 defining the maximum distance between the rolls 20, 2], and 22.

The sector gear 43 meshes with another sector gear 57 fixed to a shaft 56 on which arms 58, 59, and 60 are fixedly mounted. A gear 61 for transmitting a torque from a driving motor (not shown) to the roll 20 among the three wrapping rolls is loosely mounted on the shaft 56.

The arms 58 and 59 fixedly mounted on the shaft 56 are interconnected with each other through a tie rod 62 extending between the corresponding intermediate points closer to the free ends of the two arms 58 and 59. The roll 20 having an upper end shaft 63 and a lower end shaft 64 is so held that the upper and lower shafts 63 and 64 are received in the correspondingholes provided at the two points. A gear 65 is fixed to" the lower end of the lower shaft 64, and the'abovementioned rotational power transmitting gear 61 is brought into engagement with the gear 65.

At an intermediate-position of the arm 42 fixedly '21 having an upper end shaft 73 and a lower end shaft 74 extends between the two arms and 71 so that the upper and lower end shafts 73 and 74 are rotatably passed through corresponding holes in the arms 70 and 71, and a gear 75 is fixedly mounted on the lower end of the lower end shaft 74. The arms 70 and 71 are also interconnected by a shaft 76 passing through corresponding holes in the arms 70 and 71, and a gear 77 is mounted on the lower end of the shaft 76. The gears 72, 77, and 75 are meshed with each other so that the 1 rotational power from the driving motor is transmitted 'to the wrapping roll 21 as described hereinbefore.

The arm 60 fixedly mounted on the hereinbeforementioned shaft 56 is connected at the free end thereof with a'link-lever 78, and the other end of the link-lever 78 is further connected to an end of an arm 80 fixedly mounted on a shaft 79.

On the shaft 79, arms 81 and 82 both having substantially C-shaped configurations are fixedly mounted, and the ends of the arms 81 and 82 other than those fixed to the shaft 79 are provided with holes through which the upper and lower end shafts 83 and 84 extending from the wrapping roll 22 are passed rotatably.

The wrapping rolls 20, 21, and 22 are arranged substantially at apexes of an equilateral triangle as shown in FIGS. 5 and 6 and so adapted that they are moved toward the center of the triangle through the operations of the corresponding arms. In FIGS. 5 and 6, reference character A designates a stack of coins.

Furthermore, the shaft 36 connected to the coin- .diameter setting knob 35 is coupled through bevel I gears (not shown) to a shaft 85 shown in FIG. 9. The

shaft 85 fixedly supports a bevel gear 86 which meshes with another bevel gear 88 fixedly mounted on a shaft 87.

On the shaft 87, a cam 89 having cam surfaces corre- .Sponding to the difference in diameter of coins A is fixedly mounted, and the free end of an arm 91 fixed to another shaft 90 is urged and brought intocontact with a cam surface of the cam 89 by means of a spring (not shown). The shaft 90 fixedly supports supporting means of the hereinbefore mentioned cutter 34, the leading cutting edge of which is formed into a V-shaped and sawtooth-like configuration.

As shown in FIG. 7, the rotational speed of a driving motor 100 can be controlled as described below with reference to FIG. 8 depending on the diameter of the coin stack A. The power of the motor 100 is transmitted through an endless belt 101 to a gear 102 and a pulley 103 ,both arranged coaxially. The rotational power from the gear 102 is then transmitted through gears 104, 105, and 61, successively, to the gear 65 fixedly mounted on the end shaft 64 extending from the roll among the three wrapping rolls 20, 21, and 22. The power is further transmitted from the gear 104 through gears 106 and 77 to the gear 75 fixedly mounted on the end shaft 74 extending from another roll 21 of the three rolls. The remaining roll 22 is used simply for the guidance of the coin stack and the piece of wrapping paper,

'and no power is transmitted to this roll 22. The rotation thyristor 111 to the motor 100 of, for instance, a

capacitor-starting type. Surges created by the bidirectional thyristor 111 are reduced by capacitors 112,

I13, and 114, a resistor 115, and smoothing coils 116 and 117.

A fullwave rectifier circuit 120 is connected across the bidirectional thyristor 111 through a resistor 118, thus providing a power source for the controlling por- 'tion 119 of the motor-speed controlling circuit. The controlling portion 119 of the control circuit includes ,as its essential component a unijunction transistor 121 .(hereinafter abbreviated as UJT) which is used for generating a pulse signal.

Between the first and the second bases of the UJT "'121, a resistor 122, variable resistors 123, 124, 125,

and the primary coil of a pulse transformer 126 are connected in series. Taps of the variable resistors 123, 124, and 125, are connected respectively through contacts 127, 128, and 129 of a transfer switch 126a interlinked with the coin diameter setting knob 35 (FIG. 3) to a junction point which is thereafter connected through a normally closed contact 130, a normally opened contact 131, a capacitor 132, a resistor 133, and a diode 134 to the emitter of the UJT 121. The normally closed contact 130 is opened by a relay when the wrapping operation of a coin stack is completed, and the normally opened contact 131 is closed by a relay when a predetermined number of coins are counted.

The emitter of the unijunction transistor 121 is further connected with a capacitor 135, and between the capacitor 135 and the resistor 122, the fullwave rectifier circuit and a Zener diode 136 are connected in parallel.

The motor 100 is directly coupled with a tachometergenerator 137, and the output of the latter is connected across the capacitor 132 through a fullwave rectifier 138 and resistors 139 and 140.

In operation, when the coin diameter setting knob 35 is turned to a position corresponding to a kind of coin, the rotating speed of the driving motor 100 is set to a value adapted to the coins, and another motor, if it is used between the knob 35 and the shaft 36, is stopped at a position rotating the shaft 36 to the first step of positions of the wrapping rolls.

When a starting switch is turned to the ON position, a predetermined number of coins of a desired kind are selected and counted in the coin supplying device, and then received in the coin aligning tubular member 17. Upon reception of the predetermined number of coins in the tubular member 17, further supply of coins to the coin counting device is interrupted, and the operation of the machine 1 is shifted into the coin wrapping mode of operation.

The rotating speed of the motor 100 is set to a desired value by turning the coin diameter setting knob 35 to a position where one or more of the contacts 127, 128, and 129 of a switch 126a are thereby selectively closed. Since the pulse frequency generated in the control circuit 119 is determinedby a time constant which is varied by the resistance values of the variable resistors 123, 124, and andthe capacitance of the capacitor 132, the contact 127 is closed when a highspeed rotation of the wrapping rolls 20, 21, and 22 is preferred for the coins of a greater diameter, and the contact 129 is closed when a low-speed rotation of the rolls is preferred for the coins of. a smaller diameter.

When a motor, if it is used between the knob 35 and the shaft 36 for rotating the shaft 36, is stopped as described hereinbefore at a position rotating the shaft 36 to set the first step positions of the wrapping rolls, the cam 40 is rotated through gears 37 and 39 to the corresponding position. Since the lever 45 is urged in one direction by the spring 47, the positions of the ends of the lever 45 are determined by the cams 40 and 49.

In other words, when the roll 55 at one end of the arm 41 is in contact with the surface 53 of the, cam 50 defining the most separated positions of the wrapping rolls, the roll 54 at an end of the lever 45 is urged by the spring 47 to a position contacting the surface 52 of the cam 49 for defining the coin introducing positions of the rolls. However, in this case the roll 46 at the other end of the lever 45 does not contact the surface of the cam 40, and hence the rolls 20, 21, and 22 are placed at predetermined positions as shown by full lines in FIGS. and 6 regardless of the diameter of the coins to be wrapped.

When the shaft 48 is further rotated to turn the cams 49 and 50 to the positions where the roll 55 of the arm 41 is disengaged from the surface 53 of the cam 50 for defining the most separated positions of the wrapping rolls while the roll 54 of the lever 45 is still in contact with the surface 52 of the cam 49 defining the coin stack introducing positions of the wrapping rolls, the lever 45 is urged by the spring 47 toward the cam 40 until the roll 46 of the lever 45 is brought into contact with the surface of the cam 40. As a result, the arm 41 is rotated around the shaft 38 through an angle defined by the displacement of the lever 45 now contacting the surface of the cam 40.

At this time, the arm 42 and the sector gear 43 fixedly mounted on the shaft 38 are also rotated through a predetermined angle under the action of a constant-torque spring 67. The rotation of the arm 42 causes the shaft 68 to rotate through the link-lever 66 and the arm 69, and the arms 70 and 71 are thereby rotated. The rotation of the arms 71) and 71 causes the wrapping roll 21 to move toward the center of the three rolls by an amount corresponding to one step.

Furthermore, the above-mentioned rotation of the sector gear 43 is transmitted through the other sector gear 57 meshing with the sector gear 43 to cause the shaft 56 to rotate. The rotation of the shaft 56 in turn rotates arms 58 and 59, and the wrapping roll is thereby moved toward the center of the three rolls by one step.

in addition, the rotation of the arm 60 fixedly mounted on the shaft 56 is transmitted through the link-lever 78 and the arm 80 to cause the shaft 79 to rotate, which in turn rotates the arms 81 and 82, and the wrapping roll 22 is also moved toward the center by one step.

Thus, all of the three wrapping rolls 20, 21, and 22 are shifted toward the center through a distance corresponding to one step, which is determined by the set position of the cam 40 contacting the roll 46 of the lever 45.

More specifically, in the case of wrapping a stack of coins of a smaller diameter, the wrapping rolls are displaced by a distance 11,, corresponding to one step of the movement, to the coin introducing positions of the rolls as indicated by two-dot chain lines in FIG. 5. On the other hand, when a stack of coins of a greater diameter is to be wrapped, the wrapping rolls are displaced by a distance d also corresponding to one step movement, to the coin introducing positions of the wrapping rolls as indicated by two-dot chain lines in FIG. 6. The difference between the distances d, and d is caused by the difference of setting positions of the cam 40.

When the coin wrapping rolls 20, 21, and 22 are displaced by one step to the coin introducing positions as indicated by two-dot chain lines in FIG. 5 or 6, the vertically movable guide tube 28 of the coin guiding mechanism 5 is elevated along the center of the three wrapping rolls 20, 21, and 22 to a position closely adjacent to the lower end of the coin alining tubular member 17 under the action of a cam supported by the shaft 48, whereby when the shutter plates 26 of the shutter mechanism 19 are opened, a stack of coins of a predetermined member is received on the guide tube 28.

The guide tube 28 is then lowered to the wrapping position of the stack of coins at the center of the three wrapping rolls. When the stack of the coins is introduced between the wrapping rolls 20, 21, and 22, the cams 49 and 50 are rotated thereby placing the roller 54 of the lever 45 in contact with a surface 51 of the cam 49, which defines a minimum distance between these rolls 20, 21, and 22. Thus, the wrapping rolls are moved inwardly for a distance 1 from the abovementioned coin introducing positions to the minimumdistance positions contacting the stack of coins, as indicated by one-dot chain lines in FIG. 5 or 6, regardless of the diameter of the coins.

Simultaneously, the cam 89 is rotated through the shaft 85, bevel gears 86 and 88, and the shaft 87, in correspondence with the hereinbefore' mentioned coin diameter setting, and the arm 91 contacting the cam 89 rotates the shaft 90 through a predetermined angle. The rotation of the shaft 90 moves the cutter 34 to a position adapted to cut the wrapping paper to a suitable length.

When the stack of coins is supported in close contact with the wrapping rolls 20, 21, and 22, the vertically movable guide tube 28 of the coin transferring mechanism 5 is moved downward, leaving the coin stack holding rod 29 in contact with the lowermost coin of the stack to provide a gap and allow the passage of the lower wrapper crimping hook 24.

Simultaneously, the driving motor is rotated at a predetermined speed. The normally open contact 131 is closed as the stack of coins A is held by the three rolls. The motor speed control circuit 119 is then operated to generate from a pulse transformer a pulse signal which is determined by a time constanct defined by variable resistors 123, 124, and open or closed through the contacts 127, 128, and 129 and by a capacitor 132. The pulse signal delivered from the pulse transformer 126 is applied to the gate of the bidirectional thyristor 111 to render the same thyristor conductive and to operate the driving motor 100 at a predetermined speed.

Upon rotation of the driving motor 100, the wrapping roll 20 is rotated through gears 61 and 65, and the wrapping roll 21 is rotated through gears 72, 77, and 75. The wrapper feeding roll 31 is also rotated through gears (not shown).

Thus, the wrapping paper 25 fed through the wrapping paper feeding roll 31 and the pinch roll 32 is pulled forward when the forward end of the wrapping paper is caught in the coin wrapping device and is cut to a desired length by means of the cutter 34. The forward end of the thus cut wrapper strip 25 is passed through the wrapping rolls 20, 21, and 22, and wound around the peripheral surface of the stack of coins.

Upon completion of the winding of the wrapper strip around the coin stack, the upper and lower hooks 23 and 24 are brought into their operative positions under the control of a cam (not shown) on the shaft 48, wherein the hooks 23 and 24 catch the upward and downward projecting lateral edges of the thus wound wrapper strip 25, respectively, so that the lateral edges are foled over the upperand lowermost coins and crimped thereon in a rolled or otherwise suitable manner. The crimping hooks 23 and 24 are then shifted apart by means of the cam (not shown), and the stack of coins thus wrapped and crimped is now ready to be discharged.

At this instant, the cams 49 and 50 are further rotated in a manner interlinked to the operation of the coin wrapping machine, so that the roller 54 of the lever 45 is now brought into contact with the surface 52 of the cam 49 for defining the coin introducing positions of the wrapping rolls, and the roller 55 of the arm 41 rolls along the surface 53 of the cam 50 defining the most separated positions of the wrapping rolls. Thus, the wrapping rolls 2t), 21, and 22 are shifted to the most separate positions, whereby the now wrapped stack of coins is dropped into the chute 8 when the guide tube 28 and the holding rod 29 of the coin stack transferring mechanism are shifted sidewise as described hereinbefore.

The cams 49 and 50 are further rotated until the rol ler 55 of the arm 41 is now completely on the surface 53, at which instant the operation of the driving motor is terminated, and one cycle of the wrapping operation of the coin wrapping machine is completed.

It should be noted that any variation in the rotating speed of the driving motor 100, which might be caused by variation in the load torque, can be prevented by the arrangement of the coin wrapping apparatus according to this invention. When such variation occurs, the output voltage of the tachometer-generator 137 directly coupled to the driving motor 100 is varied, and the thus varied output voltage of the tachometer-generator is applied to the capacitor 132 through the rectifier circuit 138. Thus, the required period for charging the capacitor 132 is also varied in such a manner that a pulse signal having a shorter one-cycle period is delivered when the load torque of the driving motor 100 increases, thus preventing the speed of the driving motor from dropping, and reversely a pulse signal having a longer one-cycle period is delivered when the load torque of the driving motor 100 is reduced, thus preventing any rise in the speed of the driving motor 100.

h Although in'the above described example of the coin wrapping apparatus of this invention, the rotating speed of the motor 100 for driving the wrapping rolls 20, 21, and 22 has been regulated by an electric control circuit 1 19, it will be apparent to those skilled in the art that the motor 100 may also be controlled mechanically by means of a mechanical speed-regulating mechanism. Furthermore, the selection of the rotating speed of the wrapping rolls 20., 21, and 22 may also be carried out through any of other suitable rotation speed setting 'devices instead of the above described rotation speed setting knob.

Furthermore, the regulation of the rotating speed of the wrapping rolls may be carried out not for each kind according to diameter of coins, but also for three ranges in diameter of coins of, for instance, from mm to mm, from 20 mm to mm, and from 25 mm to 33 mm. In addition, all of the wrapping rolls 20, 21, and 22 may be driven, instead of the above described two, or, alternatively, only one of the rolls may be driven by the driving motor and regulated relative to its "rotating speed, and the rest of rolls may be adapted to be dummy rolls. It is also possible for at least one of the wrapping rolls to be held at a predetermined position, and for others to be moved inward or outward.

What we claim is:

l. In a coin wrapping apparatus having a plurality of wrapping rolls including at least one movable roll,

guide means for guiding a stack of coins into a wrapping space between said wrapping rolls and a coin stacking portion for stacking a predetermined number of coins, fold crimping means positioned adjacent said wrapping rolls, wrapping paper supply means operatively located for supplying wrapping paper to said wrapping rolls, and driving means operatively coupled for driving at least one of the wrapping rolls, a coin stack being rotated by said wrapping rolls, wrapped with a piece of paper and the lateral edges of the wrapping paper being fold crimped by said fold crimping means against upper most and lowermost coins in said coin stack, the improvement which comprises: rotational speed setting means coupled with said driving means and adapted for setting the speed of driving rotation transmitted from said driving means to at least one driving roll of said wrapping rolls to a predetermined speed in accordance with the diameter of coins to be wrapped, thereby to rotate said driving roll at-a predetermined speed in accordance with the diameter of the coins during wrapping operation; rotational speed selecting means coupled with said speed setting means and operated in response to change of diameter of coins to be wrapped so as to select a predetermined speed to be set in accordance with the diameter of coins, thereby to set said rotational speed setting means; roll-position adjusting means for positioning at least one of said wrapping rolls at a position accommodated to the diameter of coins to be wrapped and adapted for guiding the coin stack in order to adjust the wrapping space surrounded by the wrapping rolls so as to be suitable for guiding the coin stack; position selecting means operated in response to change of diameter of coins to be wrapped and adapted for selecting and setting said roll position adjusting means to the state accommodated to the coins to be wrapped; and control means operatively coupled to the respective parts of the apparatus for causing repetition of the wrapping cycle in a predetermined time cycle including various operations which are respectively carried out in mutual relationship in accordance with a previously determined sequence, and said various operations comprising the guiding operation of said coin guiding means for guiding the coin stack to the movement of the movable roll toward and away from the peripheral surface of the coin stack for accommodating said wrapping space to guidance of the coin stack in accordance with diameter of the coins, the wrapping paper supply operation, and the crimping operation for the wrapped paper.

2. The improvement as claimed in claim 1 wherein said driving means has a power circuit means coupled thereto for energizing said driving means;

said rotational speed setting means is a control circuit means connected to said power circuit means for controlling driving energy of said power circuit means, said control circuit means being comprised of a plurality of circuit elements respectively adapted to alternatively optimize the driving energy of said power circuit means for coins having different diameters; and

said rotational speed selecting means is means connected to said control circuit means for selecting one of said circuit elements in accordance with the diameter of coins to be wrapped, whereby the rotation speed of the stack of coins is always selected to be optimum for correct and secure fold crimping of said lateral edges of the wrapped paper.

means for controlling the feeding speed of said wrapping paper feeding means in accordance with the diameter of coins to be stacked, whereby the wrapping operation is optimized for any diameter of coins being 4. The improvement as claimed in claim 3 further wrapped.

comprising means operatively coupled to said driving 

1. In a coin wrapping apparatus having a plurality of wrapping rolls including at least one movable roll, guide means for guiding a stack of coins into a wrapping space between said wrapping rolls and a coin stacking portion for stacking a predetermined number of coins, fold crimping means positioned adjacent said wrapping rolls, wrapping paper supply means operatively located for supplying wrapping paper to said wrapping rolls, and driving means operatively coupled for driving at least one of the wrapping rolls, a coin stack being rotated by said wrappinG rolls, wrapped with a piece of paper and the lateral edges of the wrapping paper being fold crimped by said fold crimping means against upper most and lowermost coins in said coin stack, the improvement which comprises: rotational speed setting means coupled with said driving means and adapted for setting the speed of driving rotation transmitted from said driving means to at least one driving roll of said wrapping rolls to a predetermined speed in accordance with the diameter of coins to be wrapped, thereby to rotate said driving roll at a predetermined speed in accordance with the diameter of the coins during wrapping operation; rotational speed selecting means coupled with said speed setting means and operated in response to change of diameter of coins to be wrapped so as to select a predetermined speed to be set in accordance with the diameter of coins, thereby to set said rotational speed setting means; rollposition adjusting means for positioning at least one of said wrapping rolls at a position accommodated to the diameter of coins to be wrapped and adapted for guiding the coin stack in order to adjust the wrapping space surrounded by the wrapping rolls so as to be suitable for guiding the coin stack; position selecting means operated in response to change of diameter of coins to be wrapped and adapted for selecting and setting said roll position adjusting means to the state accommodated to the coins to be wrapped; and control means operatively coupled to the respective parts of the apparatus for causing repetition of the wrapping cycle in a predetermined time cycle including various operations which are respectively carried out in mutual relationship in accordance with a previously determined sequence, and said various operations comprising the guiding operation of said coin guiding means for guiding the coin stack to the movement of the movable roll toward and away from the peripheral surface of the coin stack for accommodating said wrapping space to guidance of the coin stack in accordance with diameter of the coins, the wrapping paper supply operation, and the crimping operation for the wrapped paper.
 2. The improvement as claimed in claim 1 wherein said driving means has a power circuit means coupled thereto for energizing said driving means; said rotational speed setting means is a control circuit means connected to said power circuit means for controlling driving energy of said power circuit means, said control circuit means being comprised of a plurality of circuit elements respectively adapted to alternatively optimize the driving energy of said power circuit means for coins having different diameters; and said rotational speed selecting means is means connected to said control circuit means for selecting one of said circuit elements in accordance with the diameter of coins to be wrapped, whereby the rotation speed of the stack of coins is always selected to be optimum for correct and secure fold crimping of said lateral edges of the wrapped paper.
 3. The improvement as claimed in claim 2 wherein said power circuit means supplies electric power to said driving means and said control circuit means controlling electric energy of said power circuit means.
 4. The improvement as claimed in claim 3 further comprising means operatively coupled to said driving means for controlling the feeding speed of said wrapping paper feeding means in accordance with the diameter of coins to be stacked, whereby the wrapping operation is optimized for any diameter of coins being wrapped. 